release v0.8-beta

Author: fbchen

README.md

@@ -6,6 +6,11 @@ No matter how complex the layout is and how deep the constraints are, it has alm
 performance as Flex and Stack. When facing complex layouts, it provides better performance,
 flexibility, and a very flat code hierarchy than Flex and Stack. Say no to 'nesting hell'.
 
+Warning:
+For layout performance considerations, constraints are always one-way, and there is no two child
+elements that directly or indirectly restrain each other. Each constraint should describe exactly
+where the child elements are located.
+
 Anyone who sends you a harassing message, you can send him Flutter code and use nested hell to rule
 him.
 
@@ -60,7 +65,7 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v0.7-beta'
+      ref: 'v0.8-beta'
 ```
 
 # Example

lib/constrait_layout/constraint_layout.dart

@@ -17,22 +17,6 @@ import 'package:flutter/rendering.dart';
 /// indirectly restrain each other. Each constraint should describe
 /// exactly where the child elements are located.
 ///
-/// features:
-///   1. build flexible layouts with constraints
-///   2. margin and goneMargin
-///   3. clickPadding (quickly expand the click area of child elements without changing their actual size)
-///   4. visibility control
-///   5. constraint integrity hint
-///   6. bias
-///   7. z-index
-///   8. percentage layout
-///   9. guideline
-///
-///  not implement
-///   . barrier
-///   . constraints visualization
-///   . chain
-///
 /// author: hackware
 /// home page: https:///github.com/hackware1993
 /// email: [email protected]